Apparatus for washing caoutchouc, gutta-percha, and similar substances.



P. KEMPTER.

GAOUTGHOUG, GUTTA PEROHA, AND SIMILAR SUBSTANCES. APPLIOA'I'ION FILEDNOV. 7, 1907.

APPARATUS FOR WASHING Patented Oct. 5, 1909.

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7% awn QM 5. 1014 W1 iff APPARATUS IOR WASHING GAOUT F. KEMPTER.

GHDUG, GUTTA PEBCHA, AND S APPLICATION FILED NOV. 7, 1907.

iMILAR sUBsTANoBs.

Pmmd 0ct.5,1909.

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UNITED sinas .ATENT ornicn.

FRITZ KEMP'I'ER, OF STUTTGABT, GERMANY.

Specification of Letters Patent.

Patented Oct. 5, 1909.

Application filed November 7, 1907. Serial No. 401,158.

To all whom "it-may concern:

Be it known that I, FRITZ KEMPTER, a subject of the German Emperor,residing at Stuttpart, Germany, have insyented new and usefu Imrovements in Apparatus for Washing aoutchouc, Gutta Percha, and

' Similar Substances, of which the following is a specification.

y In a co-pending patent application filed by-me November 7, 1907, underSerial No. $01,157, is described an apparatus for wash- 1n% caoutchoucand similar articles.

I he. invention which Terms the siibjectmatter of the presentapplication relates to an improvement on the apparatus described in theabove application, and has for its object to provide additionalefiicient means for cutting up the mass under treatment.

In the accompanying drawings: Figure 1 is a longitudinal section of myimproved apparatus, and Fig. '2 a cross section thereof. hearrangementof thecrushing rollers f, g, and their position with regardto the stone catchingand rejecting flanges is, Z, are the same asdescribed in the co-pending ap-.

plication hereinabove referred to.

The bottom of the trough ortank containing the rollers is first curvedbeneath part of the rollers and then slopes down abruptly to form anedge or cutting saddle 1, 2. By these saddles the material to hiewashedis submitted twice to the opening process at each revolution ofthe rollers. At the center, the bottom of the trough is provided with apocket or channel 3, adapted for the collection of sand. Centered abovethis channel there is arranged between rollers f, g, a coniiorm mainsaddle i, between which and the side walls-of the channel, there remainslots or escape openings. These openings may .be closed, more or less.by exchangeable plates 4, which may be introduced from below by openingthe hinged bottom of the channel.

The partial or entire closing of the openings is of importance, as somekinds of caoutchouc at the beginning of the treatment and when workingwith water of low temperature easily form fragments, the loss of whichis prevented by closing the channels, If subsequently the caoutchouc istreated with hot water, the material to be washed will form a plasticmass, so that the closing plates may be entirely removed or plates ofsmaller size be substituted. in this way the heavier impurities, such assand, etc, which were separated at the beginning of the operation onthesaddles, will escape through the slots into'thc channel, from whichthey may be readily removed.

' As shown, not only the central channel 3,

of the trough, but also the jacket or, is pro- These botvided with ahinged bottom. toms have outlet cocks 5, 6, and 7, for the escape of thewater.

. Iclaim: A

A device of the character described, coin prising a pair of crushingrollers, an inclos- 'ing tank having a concave bottom section beneatheach roller, slopes adj oinin'g-the concave sections, a pocketintermediate the slopes, a saddle-above the pocket, openings at thesides of the saddle, and'means for partly or entirely closing saidopenings, substantially as specified.

In witness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses. FRITZ KEMP'ITER. Witnesses: Y ALEXANDERKRETSGHMER', ERNEST ENTENMANN.

